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Comment: Parasoft Jtest 2021.1

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Code Block
bgColor#FFcccc
class Dimensions {
  private int length;
  private int width;
  private int height;
  static public final int PADDING = 2;
  static public final int MAX_DIMENSION = 10;

  public Dimensions(int length, int width, int height) {
    this.length = length;
    this.width = width;
    this.height = height;
  }

  protected int getVolumePackage(int weight) {
    length += PADDING;
    width  += PADDING;
    height += PADDING;
    try {
      if (length <= PADDING || width <= PADDING || height <= PADDING ||
        length > MAX_DIMENSION + PADDING || width > MAX_DIMENSION + PADDING ||
        height > MAX_DIMENSION + PADDING || weight <= 0 || weight > 20) {
        throw new IllegalArgumentException();
      }

      int volume = length * width * height; // 12 * 12 * 12 = 1728
      length -= PADDING; width -= PADDING; height -= PADDING; // Revert
      return volume;
    } catch (Throwable t) {
      MyExceptionReporter mer = new MyExceptionReporter();
      mer.report(t); // Sanitize
      return -1; // Non-positive error code
    }
  }

  public static void main(String[] args) {
    Dimensions d = new Dimensions(108, 108, 108);
    System.out.println(d.getVolumePackage(21)); // Prints -1 (error)
    System.out.println(d.getVolumePackage(19));
    // Prints 1728 2744(12x12x12) instead of 1000 1728(10x10x10)
  }
}

The catch clause is permitted by exception ERR08-J-EX1 EX0 in ERR08-J. Do not catch NullPointerException or any of its ancestors because it serves as a general filter passing exceptions to the MyExceptionReporter class, which is dedicated to safely reporting exceptions as recommended by ERR00-J. Do not suppress or ignore checked exceptions. Although this code only throws IllegalArgumentException, the catch clause is general enough to handle any exception in case the try block should be modified to throw other exceptions.

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Code Block
bgColor#ccccff
protected int getVolumePackage(int weight) {
  length += PADDING;
  width  += PADDING;
  height += PADDING;
  try {
    if (length <= PADDING || width <= PADDING || height <= PADDING ||
      length > MAX_DIMENSION + PADDING || 
      width > MAX_DIMENSION + PADDING || 
      height > MAX_DIMENSION + PADDING || 
      weight <= 0 || weight > 20) {
      throw new IllegalArgumentException();
    }

    int volume = length * width * height; // 12 * 12 * 12 = 1728
    return volume;
  } catch (Throwable t) {
    MyExceptionReporter mer = new MyExceptionReporter();
    mer.report(t); // Sanitize
    return -1; // Non-positive error code
  } finally {
    // Revert
    length -= PADDING; width -= PADDING; height -= PADDING; 
  }
}

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Failure to restore prior object state on method failure can leave the object in an inconsistent state and can violate required state invariants.

Rule

Severity

Likelihood

Remediation Cost

Priority

Level

ERR03-J

Low

Probable

High

P2

L3

Automated Detection

ToolVersionCheckerDescription
Parasoft Jtest

Include Page
Parasoft_V
Parasoft_V

CERT.ERR03.REVOBJRestore prior object state on method failure

Related Vulnerabilities

CVE-2008-0002 describes a vulnerability in several versions of Apache Tomcat. If an exception occurs during parameter processing, the program can be left in the context of the wrong request, which might allow remote attackers to obtain sensitive information. An exception can be triggered by disconnecting from Tomcat during this processing.

Related Guidelines

MITRE CWE

CWE-460, Improper Cleanup on Thrown Exception

Bibliography

[Bloch 2008]

Item 64, "Strive for Failure Atomicity"

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